DeveloperHA / Developer tools

DeveloperHA tool library

Free .NET developer tools

Browser-based tools for C#, ASP.NET, APIs, SQL, Docker and deployment. Every one of the 21 normal browser tools has a dedicated page, and the complete toolbox remains available from the homepage.

Privacy: the normal tools run in your browser. No signup or backend is required.

JSON to C#Generate System.Text.Json C# models from JSON.Open dedicated page →OpenAPI to C#Generate typed models and HttpClient methods.Open dedicated page →SQL formatterFormat common SQL and catch structural issues.Open dedicated page →Docker Compose generatorBuild an ASP.NET app stack with databases.Open dedicated page →appsettings validatorCheck ASP.NET configuration and secret risks.Open dedicated page →Connection string builderBuild SQL Server/PostgreSQL and EF Core wiring.Open dedicated page →API request runnerRun CORS-enabled APIs from the browser and import cURL or HTTPie.Open dedicated page →Web playgroundRun HTML, CSS and JavaScript in a sandboxed browser preview.Open dedicated page →Cron builderGenerate Hangfire and Quartz.NET schedules.Open dedicated page →GUID generatorGenerate .NET UUID v4 values.Open dedicated page →JWT decoderInspect JWT payloads and expiry locally.Open dedicated page →Regex testerTest expressions and capture groups.Open dedicated page →Text diffCompare code, JSON and configuration.Open dedicated page →Hash & HMACHash text and inspect HMAC values.Open dedicated page →Unix timestamp converterConvert Unix time and .NET ticks.Open dedicated page →Encode/decodeConvert Base64, URL, HTML and Hex values.Open dedicated page →Case converterConvert common naming conventions.Open dedicated page →JSON formatterFormat, minify and sort JSON.Open dedicated page →cURL to C#Turn HTTP cURL commands into C# HttpClient.Open dedicated page →SQL/.NET type mapReference SQL, CLR and EF Core types.Open dedicated page →Password generatorCreate secure random development secrets.Open dedicated page →AI Dev CopilotAsk about verified DeveloperHA experience or practical .NET programming.Open dedicated page →

Need a senior .NET engineer?

Use the tools for free, then get help with the architecture or delivery problem behind them.

See fixed-price packages